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Troubleshoot BMW TCU telematic control unit

Time Required

15 - 30 min

Difficulty

Easy

Category

Maintenance

In this guide, we take a look at how to read fault codes from BMW telematic control unit (TCU) module using an OBD-II diagnostic scanner. BMW TCU module is located in the trunk area but fault codes stored in the TCU can be read via the OBD-II port under the dashboard. BMW TCU module contains the Bluetooth module.

A defective TCU module can prevent your phone from connecting to the car via Bluetooth. TCU and your Bluetooth handset communicate with each other via the antenna connected to the TCU.

When purchasing a BMW scanner, verify that it supports your BMW model and year. Full system scanners that are known to work on BMW vehicles can range in price from $150 to $800 USD. Learn more about popular BMW scanners here.

Buy BMW TCU module

You can buy BMW TCU from your dealer or purchase a BMW TCU Module online. Note that TCU module needs to be programmed and coded to match the options and your VIN number. Keep in mind that the Bluetooth code used to pair your phone with the car is stored in the TCU.

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